The INSIDER Summary:

Always take advantage of free samples - they'll open up any product if you ask nicely.

Two-Buck Chuck is the best deal in the store.

Pick up a Fearless Flyer to stay in the loop about new products.

Trader Joe's has achieved cult-like status. Shoppers of the seafaring-themed supermarket love its localized offerings, low prices, super-friendly staff, and lovable, kitschy decor—especially those chalkboard signs scrawled with punny food jokes. Last summer, the tiki-inspired grocery chain was even named America's favorite market for the third year in a row, and honestly we can't say we're surprised. But we were caught off guard by some of the hidden secrets we discovered about good ol' TJ's.

1. It wasn't always a favorite

From 1958 to 1967, TJ's was just a humble set of small one-stop shops called Pronto Market. The first full-fledged grocery store was named for proprietor Joe Coulombe and opened in Pasadena, California in 1967.

2. Now there are more than 400 stores - and counting - nationwide.

Finally branching out from its humble Californian roots in 1993, the chain expanded first to Phoenix, Ariz., then to the Pacific Northwest and later hopped across the country to Brookline, Mass. Bonus: There are ten more outposts slated to open soon in Michigan, Alabama, Oklahoma, and Washington. The company is now owned by the folks behind the German market Aldi. From produce to flowers, Trader Joe's has a little bit of everything.Aranami/Flickr

3. Look for the plastic lobster

And it's hidden, Where's Waldo style. So the next time you're filling up your ruby-red cart, take a closer look around the store.

4. The Two-Buck Chuck is basically the best buy in the store.

Since debuting in 2002,that deliciously dirt-cheap Charles Shaw wine is both a customer favorite and a vino award winner. It's surprisingly made by an offshoot of the famous Franzia family and, unsurprisingly, is exclusively TJ's.

That's what they're there for. Staff members are known as crew, with leaders referred to as mates. Other job titles include merchants and captains. Everyone working at Trader Joe's is notoriously nice, as long as you don't act like a total pirate.

6. The Fearless Flyer can be used to your advantage.

It's a newsletter-catalog-comic-book hybrid filled with stories about the store's latest products to keep you in-the-know and entertained. You can either pick it up at the store, or subscribe via USPS or email.

7. Be on the lookout for at least one new product each week.

Pretzel bagels, kale sprouts—the store's offerings change with the seasons and the current culinary trends. Be on the lookout for the newbies while you're making your milk run.

The employees will let you sample anything if you ask nicely. Getty Images/Michael Nagel

8. Respect the Hawaiian shirts.

Keeping with the maritime theme, crew members flaunt flower- and palm-tree printed T-shirts inspired by the company's early days during the tiki-centric 1960s.

9. TJ's will reward you for getting creative in the kitchen.

Every now and then, the company hosts nationwide cooking contests where the prizes are—you guessed it—TJ's gift cards. Right now, there's a "Strut Your Stuffed" recipe contest where up to eight TJ's ingredients can be used to stuff peppers, potatoes, turkeys, anything your creative heart desires.

10. Ask Joe to come to your town.

If you're feeling serious FOMO, you can do something about it. Just fill out an online form, rally your friends to do the same, and then cross your fingers and hope the TJ's crew comes to you. There's no guarantee, but the company says that "being wanted matters."

Notice the lack of branded items? That's very much on purpose. TJ's sources its products directly from suppliers to keep quality high and price points low. The resulting private-label goods are given quirky names like Trader José (Mexican food), Trader Jacque (French food), and Trader Joe-San (Japanese food).

12. Those random bells are like Morse code.

Ditching PA systems, the team first started communicating using maritime bells: one ding for another register to open, two for questions at checkout, and three for manager assistance. After that, they could just be messing with our minds.

13. Sometimes you have to say so long, farewell to your favorite products.

Everyone knows the stores are notoriously small, which means every item really needs to bring it. If your favorite obscure chocolate bar doesn't do well and gain a following, TJ's has no choice to cut it and make space for another red-hot number. Other times, your new go-to is just a one-off specialty product and it won't be restocked for a while. But don't dismay too much and listen to Joe himself: "It's all part of the shopping adventure."